Don't you wish you'd worn that? Trouser suits

The spectre of mid-Seventies Bianca Jagger presides over the
trouser suit, braless and avenging, in a 'None shalt ever wear a
trouser suit quite as well as I did back in the day!' way. So, yes,
it's hard. Entry-level trouser-suitage is 'Le Smoking'. Then there
is the one-button, slinky finish, almost pyjama, pretending to be
cosy while actually being deeply predatory. Did I just flash a tit?
Oops, sorry (not really). Beyond this, the main problem is avoiding
looking depressingly practical, as if you chose your outfit for
boring reasons like the fact that it keeps your legs warm and you
only have to iron the very front panel of your shirt. This is what
flats will never do, and you must always have at least one juicy
cleavage showing, be it toe or breast, to counteract the inevitable
whiff of the photocopier.